1.AECOM Perunding Sdn Bhd
2.Aker Engineering Malaysia Sdn Bhd (Founder Member) 
3.Blackstone Process Solutions Sdn Bhd
4.Cekap Technical Services Sdn Bhd
5.Environmental Resources Management (M) Sdn Bhd
6.Enserv Sdn Bhd
7.Emerson Process Management (M) Sdn Bhd
8.Innovative Fluid Process Sdn Bhd
9.MECIP Global Engineers Sdn Bhd
10.MMC Oil & Gas Engineering Sdn Bhd (Founder Member) 
11.Pegasus Asia Pacific Sdn Bhd
12.Protek Engineers (Founder Member) 
13.Peritus International Sdn Bhd
14.Ranhill Worley Parsons Sdn Bhd (Founder Member) 
15.RNZ Integrated (M) Sdn Bhd
16.Synergy Oil & Gas Engineering Sdn Bhd
17.Technip Consultant (M) Sdn Bhd (Founder Member) 
18.Toyo Engineering & Constructions Sdn Bhd
19.UIE Solutions (M) Sdn Bhd
20.Winmore Engineering Sdn Bhd
21.WEG South East Asia Sdn Bhd
22.Malaysia Marine & Heavy Engineering Sdn Bhd
23.Minconsult Sdn Bhd
24.Tanjung Offshore Services Sdn Bhd
25.Water Engineering Technology Sdn Bhd
26.Fluor Daniel International (M) Sdn Bhd
27.Wood Group Engineering Sdn Bhd
28.IGL Services Sdn Bhd
29.SEAMOG Group Sdn Bhd
30.Perunding ENRA Sdn Bhd